Floor drain



'March 28, 19 50 c, SCHENCK 2,501,971

FLOOR DRAIN Filed July 23, 1947 INVENTOR ROBERT C. SCHENCK ATTORNEYSPatented Mar. 28, 1950 FLOOR DRAIN Robert C. Schenck, Dayton, Ohio,assignor to The Duriron Company, Inc., Dayton, Ohio, a corporation ofNew York Application July 23, 1947, Serial No. 762,843

4 Claims. 1

The present invention relates to acid-handling apparatus, moreparticularly to drainage system for directing superfluous or spilledacid to a drain.

In rooms containing apparatus which utilizes corrosive fluids such asacid concentrators, it is customary to provide drains at the lowestpoint in the floor to conduct spilled or superfluous acid as quickly aspossible to the sewer. The floors are usually made of heavy concrete tosustain maximum weight and it has been found that when the concretehardens there is a tendency for it to pull away from the peripheralsurface of the drain to leave circular openings. Moreover, cracks in theconcrete are apt to develop in the immediate vicinity of the drain dueto curing stresses.

Consequently the acid in moving toward the drain may flow into thesespaces or cracks and seep into the floor below and also perhaps causecrumbling or other deteriorating eifects on the concrete. In order toavoid this undesired flow of the corrosive fluid it has been proposed toprovide the drain with a plurality of side openings under the floorlevel in an attempt to collect the seepage fluid and direct the sameinto the same drain as the main portion of the fluid which enters thedrain from the top.

A tar paper ring has been employed to direct the fluid into these sideopenings, the ring being secured to an annular flange extendingoutwardly from the drain. However, difficulty has been encounteredheretofore in securing all parts of the tar paper ring to the flange sothat cracks were still left through which the acid could creep and bediverted away from the side openings.

The primary object of the invention is to provide an improved floordrain for use in concrete floors and of the type employing a tar paperring for diverting all of the migratory fluid about the drain into theside opening thereof.

Another object is to provide a new method and structure for fastenin thedivertin ring of tar paper to the annular flange of the drain.

The above objects are attained in brief by positioning the annular ringof a flexible non-corrodible material such as tar paper edgewise of theside openings of the drain, and supporting t rin i an impro ed ma e o ai ate ceiving and directing the seepage fluid into the annular openings.

Other objects and features will be apparent as the specification isperused in connection with the accompanying drawings in which;

Fig. 1 represents a plan view of the improved drain, partly broken away,to show the normally hidden parts.

Fig. 2 is a sectional View of the drain and improved tar paper accessoryembedded in the concrete surrounding the drain,

Fig. 3 depicts a fragmentary sectional view showing a portion of the tarpaper-retaining device in place while Fig. 4 is a View similar to Fig.3. but showing the tar paper guide and also its complete retainingdevice in full detail.

Referring to Figs. 1 and 2, reference character I generally designatesthe improved floor drain which may be made entirely of cast corrosiveresistant material such as high silicon iron. The drain takes the formof two cylindrical bodies indicated at 2, 3, of different diameters andconnected together through a tapering portion 4. The upper cylindricalportion 2 of the drain has an inverse taper as indicated, so that whenthe concrete is poured about the drain the latter is held rigidly inposition. This portion at the interior is provided with an inwardlyprojecting flange 5, which forms a ledge for supporting the drain disc6, also cast out of a corrosive-resistant metal, the disc being formedwith openings 1 of any suitable shape which serve as outlets for liquidreaching the top surface of the drain. If desired the lower surface ofthe disc may be given a curvilinear shape indicated at 8 in order toimpart strength to the periphery. This disc rests on the ledge 5 and isremovable for cleaning and replacement purposes.

At the base of the tapered portion 2. i. e. where it merges with theconical connecting portion 4,

there is provided a number of equidistantly spaced radially extendingauxiliary openings 9, 6 as shown, these openings serving the purpose ofreceiving acid which collects about the exterior surface of the drainand is not in a position to reach the main openings 1.

The drain is usually positioned at the lowest point in the floor and isconnected to a sewer or other disposal line. It is usually embedded inconcrete at the time that the floor is laid. It has been found thatduring the setting and curing of the concrete, spaces may be formedbetween the outside surface of the drain and the adjacent concrete mass,these spaces extending up to the floor level. Again, over continued use,no doubt due to excessive stress in the concrete as when acidconcentrators are being supported, chinks or cracks may develop in theconcrete short dis tances away from the drain and obviously, all of theacid flowing toward the drain will first reach these openings andcracks. Even if the cracks do not extend through the entire thickness ofthe floor, the liquid becomes lodged within the concrete and attacks thelime, causing the concrete to deteriorate or at least cause othercontinuous cracks to develop. The result is that the concrete in theimmediate vicinity of the drain becomes normally checked with cracks,all of which receive their proportion of the fluid and in extreme casesthe acid finds its'way through the entire floor thickness to seep intothe floor below. The auxiliary openings 9 are intended to collect thisharmful fluid and to pass the same into the drain in the same manner asif the fluid had reached the main openings 1.. For this purpose there isprovided an annular ring or sheet iii, of a bendable material whichresists acid corrosion,

and in this connection extra heavy tar paper is satisfactory. Forsupporting the tar paper in line with the openings 9, the drain elementis provided with an annular flange H extending radially outward, theflange having an upturned :1

lip indicated at l 2 in order to shape the tar paper ring to a gradualdownwardly extending incline leading to the openings.

When laying the floor the concrete i poured up to the level of theuppermost edge of the lip IZ, assuming that the drain has been placed inposition, at which time the tar paper ring ill is then applied. Itbecomes necessary to secure this ring in position preparatory to layingthe upper course of concrete and for this purpose an improved retainingelement is employed. As shown in Figure 3 a number (six asillustratively exemplified) of upright tabs l3 of any heat resistingmetal or alloy, are molded in the flange member I l, the tabs beingprovided with an outward extending hook 14, in order more rigidly to beretained within the metal of the flange. The tar paper ring I0 isprovided with slits or openlngs corresponding to the position of thesetabs l3 so that the ring can be pressed over the tabs and held therebyin the transverse direction. In order that the ring will have notendency to move in the vertical direction, thus creating a spacebetween the paper and the upper surface of the flange l I, I provide aclamping ring l5, preferably of circular cross section and having aninternal diameter such as snugly to fit about the outer surfaces of thetab as shown in Fig. 4. Inasmuch as the function of this ring is merelyto hold the tar paper down while the upper course of concrete is beinpoured, after which the concrete will hold the tar paper rigidly inposition, the ring need not be made of an acidresisting metal and forthis purpos cold rolled steel is suitable. With the ring in place, thetabs I3 can then be bent tightly over the ring as indicated in Fig, 2 inorder to press the tar paper closely against the flange ll. Thus thering and the bent effect of the tabs 13 create a downward clampingpressure on the tar paper. When the upper course of concrete is laid,the weight of this course will serve to press all parts of the tar paperring tightly against the flange so that the ring serves as a virtualguide for any fluid that may seep through the concrete or between theconcrete and the metal drain, causing this fluid to flow through one ormore auxiliary openings 9 into the drain. The ring ID may extendoutwardly as far as desired and no space between the tar paper and theconcrete will develop on account of the weight of the mass of concreteresting on the ring.

Thus the ring I!) constitutes an absolute barrier to the passage ofdeleterious acid which may tend to flow through any passages in theconcrete and which might not normally find its way to the sewer ducts.It should be noted that the use of the tabs l3 offer th unique advantagein this connection in that they can be readily secured as by molding inthe flange l I, made of high silicon iron. Metal of this character isextremely hard, practically entirely unmachinable so that it would notbe feasible to use ordinary fastening means such as screws for holdingthe tar paper in position. If it is attempted to mold nuts in the flangemember for receiving headed bolts, it will be found that the heat of themolten metal has ruined the threads of the nuts or the silicon or themolding sand has damaged these threads. But by providing a tab cut fromsheet metal and having a planar surface with simply a hook at the bottomconvenient devices for fastening the tar paper are readily applied tothis unmachinable metal. Th rin in can be readily applied by the workmenlaying the concrete as it requires very little skill in the machine artand merely the use of a hammer.

From the foregoing it is evident that I have disclosed an improved formof drain including the tar paper fluid-directing accessory and its improved clamping or holdin device. The drain not only accommodates thebulk of the fluid that reaches the main opening therein but also thefluid which would normall seep between the tar paper disc and itssupporting flange in the absence of the improved ring clampingstructure. Inasmuch as the main parts of the drain are made of acidresisting metal such as high silicon iron, the drain element hasconsiderable life and the tar paper, together with its clamping deviceis practically indestructible since any acid reaching this element isimmediatel directed toward the openings 9 and is not permitted to remainin the immediate vicinity of the drain.

It will be understood that various modifications and arrangements instructure could be made without departing from the spirit of myinvention and, accordingly, I desire to comprehend such modificationsand substitutions of equivalents as may be considered to come within thescope of the appended claims.

Having thus fully described my invention what I claim as new and desireto secure by Letters Patent, is:

1. A drain for passing corrosive fluid, said drain being adapted to beembedded in a con crete floor in which crevices appear near the drainand collect seepage, said drain comprising a hollow member provided withan outwardly ertending flange, auxiliary openings positioned. about themember in the region of the flange, and means including a tar paper discof approximately the same shape as the drain but of larger size,presented edgewise to the auxiliary openings oi the drain, and aone-piece detachable device for holding said disc tightly to said flangewhereby all of the seepage fluid is directed through said auxiliaryopenings into the main opening of the drain.

2. A drain for passing corrosive fluid, said drain being adapted to beembedded in a concrete floor in which crevices may appear and collectseepage, said drain comprising a circular member provided with aradially extending flange, auxiliary openings positioned about themember in the region of the flange, and means for dig-q rectingthe-seepage fluid through said auxiliary means including a tar paperannular disc, and means including a clamping ring for securing the discto said flange.

3. A drain for passing corrosive fluid, said drain being adapted to beembedded in a concrete; iioor 'n' 'which crevicesf may appear andcollect s pagejfsa-id drain comprisin ai circular member theseeping:fluid throu hsaia auxnnl o ening ,into-yth main opening of "the drain,said means including a tar paper. annular. disc, and means for securingthe disc tosaid flange, said last meiie openings in the tar paper discfor snugly receiving the tabs.

4; A drain for passing corrosive fluid, said drain I being adapted to beembedded in a concrete floor in which crevices may appear and collectseepage,

provided with a radially jextending flange, aui openings positionedabout the member i lumber vided with a radially extending flange,auxiliary w openings positioned about the member in the region of theflange, and means for directing the seepage fluid through said auxiliaryopenings into the main opening of the drain, said means openings intothe main openings of the drain, said including a tar paper annular disc,and means for securing the disc to said flange, said last mentionedmeans including tab uprights moulded inthe flange and located in acircular path,

openings in the tar paper disc for snugly receiv-- ing the tabs, and ametal ring fitted tightly about said tabs over which the tabs are bentto hold f the tar paper permanently in position.

ROBERT C. SCHENCK.

REFERENCES CITED .gQjlfbe following references are of record in the fille of this patent:

" UNITED STATES PATENTS Name Date 1,143,174 Comstock June 15, 191511,434,254 Sanders Oct. 31, 1922 1,448,769 Sanders Mar. 20, 19231,766,621 Fleming June 24, 1930 2,299,705 Svirsky Oct. 20, 1942

